gas tempering

例句：

1. 1. The process of gas tempering is crucial for the quality of the steel.
   气体退火过程对钢材的质量至关重要。
2. 2.During gas tempering, the temperature and pressure are carefully controlled to achieve the desired properties.
   在气体退火过程中，温度和压力被严格控制以获得所需的性能。
3. 3.The steel was then subjected to gas tempering to improve its toughness and strength.
   然后对该钢进行了气体退火处理，以提高其韧性和强度。